Five motorcyclists from New Zealand have made a rare crossing of the world's most militarised border, as part of a ride for peace across North and South Korea.

The crossing was part of a 9,000 kilometre journey that began in the Russian city of Magadan, and aimed to traverse the mountain "spine" of the Korean peninsula, from Mount Paektu in the North to Mount Halla in the South.

Permission is rarely granted by either of the Koreas - let alone both of them - for foreigners to pass through the demilitarised zone (DMZ) that has divided the peninsula for the 60 years since the 1950-53 Korean War.

The bikers were allowed by the two Koreas to cross along a corridor near the west coast that has been cleared of landmines and is used by South Koreans visiting the jointly run Kaesong factory zone.

One of the riders, Gareth Morgan, says the trip, which the group calls 'The Long Drop' has been "wonderful" so far.

"We're riding between Baekdu-san and Halla-san to make the point really that Korea has a 5,000-year history - it's an amazing history," he said.

"Korea really is one country - the issue we all face is how do we get back to that?"

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